Refactor client cert private key handling.

net/http/failing_http_transaction_factory.cc

Index: net/http/failing_http_transaction_factory.cc
diff --git a/net/http/failing_http_transaction_factory.cc b/net/http/failing_http_transaction_factory.cc
index 7d49327a57a46dfec9e498da811b08310b1304b8..243416a397d6cfe6b3f213dca8f163db6f12bcc8 100644
--- a/net/http/failing_http_transaction_factory.cc
+++ b/net/http/failing_http_transaction_factory.cc
@@ -41,8 +41,8 @@ class FailingHttpTransaction : public HttpTransaction {
             const CompletionCallback& callback,
             const NetLogWithSource& net_log) override;
   int RestartIgnoringLastError(const CompletionCallback& callback) override;
-  int RestartWithCertificate(X509Certificate* client_cert,
-                             SSLPrivateKey* client_private_key,
+  int RestartWithCertificate(scoped_refptr<X509Certificate> client_cert,
+                             scoped_refptr<SSLPrivateKey> client_private_key,
                              const CompletionCallback& callback) override;
   int RestartWithAuth(const AuthCredentials& credentials,
                       const CompletionCallback& callback) override;
@@ -96,8 +96,8 @@ int FailingHttpTransaction::RestartIgnoringLastError(
 }
 
 int FailingHttpTransaction::RestartWithCertificate(
-    X509Certificate* client_cert,
-    SSLPrivateKey* client_private_key,
+    scoped_refptr<X509Certificate> client_cert,
+    scoped_refptr<SSLPrivateKey> client_private_key,
     const CompletionCallback& callback) {
   return ERR_FAILED;
 }